NORTH RICHLAND HILLS, TEXAS — Surgical mask manufacturer Prestige Ameritech is expanding its operations into North Richland Hills. The company will occupy a 220,000-square-foot manufacturing facility located at 7201 Iron Horse Blvd. beginning in January 2010. It plans to employ more than 400 workers at the facility by 2015. The Iron Horse Boulevard building was previously occupied by Kimberly-Clark but has sat vacant since the company relocated its operations in 2001. Terms of the lease and the landlord's name were not disclosed.